Get the all the root nodes of a graph — get_all_roots • orbweaver

Retrieves the nodes in a graph that have no parents

Usage

get_all_roots(graph, ...)

Arguments

graph: A graph object
...: Unused

Value

A character vector of nodes

See also

Other analyze graphs: find_all_paths(), find_path(), find_path_one_to_many(), get_all_leaves(), get_leaves_under(), get_roots_over(), least_common_parents()

Examples

graph <- graph_builder() |>
  add_path(c("A", "B", "C")) |>
  add_path(c("A", "D", "C")) |>
  add_path(c("Z", "B", "C")) |>
  build_directed()

get_all_roots(graph)
#> # of nodes: 2
#> |           Nodes           |
#> |             A             |
#> |             Z             |
#>